Controller S7-300 DI Input

S7-300 Digital Input Module (DI Module)

The digital input module is used to receive external switching signals (such as 24V DC, 120V AC, 230V AC, etc.) and convert them into digital signals that can be processed by the PLC.

Main features:

1. Signal type support:

o Support DC (DC) and AC (AC) signal input, common voltage levels are 24V DC, 120V AC, 230V AC, etc.

o Support dry contact (passive signal) and wet contact (active signal) input.

2. Number of channels:

o modules typically offer 8, 16, 32, or 64 digital input channels, depending on the model.

3. Electrical isolation:

o Most modules feature electrical isolation to prevent external interference from affecting signal acquisition.

4. Diagnostic function:

o Provides diagnostic functions, such as short circuit detection, broken line detection, etc., to facilitate troubleshooting.

5. Response time:

o Short response time, usually in the millisecond level, suitable for high-speed signal acquisition.

6. Modular design:

o Modular structure is easy to expand and maintain, and users can flexibly configure according to requirements.